Locking device for open windows



May 22, 1934. PARIS 1,960,024

LOCKING DEVICE FOR OPEN WINDOWS Filed April 5. 1932 PAUL PARIS I NVENTOR 'AT TORNEYS i atented May 22, 1934 PATENT OFFICE.

Application April 5, 1932, Serial No. 603,279 In Germany April 13, 1931 3 Claims.

My invention relates to locking devices for open windows and has for its principal object the production of a simple and efficient means for securing or holding the sashes of pivotal windows of all kinds especially of French windows in every position when opened, thereby avoiding any other manipulation except the opening or the shutting of the sashes.

Another object of my invention is a simple manufacturing of the device, so that it can be readily and rapidly attached.

With these and other objects in view my invention consists of two jaws pivotally fastened to the window frame, a pin mounted on the sash-frame and being embraced by the two jaws clamped together by means of a spring. The jaws are provided at their inner edges with notches fixing the different positions in which the pin can rest for securing or holding the window. Furthermore the teeth between the notches are so shortened to form between the jaws a slideway of smaller width than the diameter of the I pin, thus avoiding a too great shearing efiect and permitting the opening and closing of the window with small expenditure of power only. For equalizing the enlargement of the leverarm in the wider opened positions it is advantageous to taper the slide-way to the front end of the device.

Furthermore the rear ends of the jaws are provided with flanges which when fitted together form a casing for the spring wound around the pivot, so that the spring together with the flanges causes the clamping action of the device.

My invention is described and claimed in the following specification and is illustrated in the accompanying drawing, in which Fig. i is a side-elevation of the device,

Fig. 2 a plan view in the closed position,

Fig. 3 a plan view in the opened position,

Fig. 4 a cross section according to line 11-11 in Fig. 2,

Fig. 5 a perspective view of the device mounted on a window.

In the drawing 1 indicates the window frame and 2 the window sash.

To the window frame 1 is secured an angle iron 3 by means of screws 01' rivets 4. The horizontal flange of the angle iron 3 bears a pin 5 to which a bar 6 is pivotally connected, forming the one jaw for the locking device. Intermediate its length this bar or jaw 6 is provided with a screw 8, by which means the second jaw 7 is pivotally connected to the jaw 6. Each jaw 6 and '7 is provided around the pivot 55. 3 with one perpendicular flange 9 and 10 at opposite edges. These jaws 6, '7 with their flanges 9, 10 are fitted together to form a casing for a spring 11, wound around the pivot 8 and support with its ends on the flanges 9, 10 respectively, thus causing the opposite 01' front ends of the jaws 6, to be clamped together.

The inner edges of the jaws 6 and '7 are provided with notches 11. The teeth 12 between the notches 11 are cut away to form a slide-way 13, when both jaws are clamped together. Only at the front end these teeth are maintained, thus forming abutting parts 17, 18 for limiting the movement of the jaws towards one another.

To the window sash 2 is mounted a pin 14 by means of an angle iron 15, secured to the sash by means of screws or rivets 16. The pin 14 projects into the space between the two jaws, and both parts of the device, the pin 14 and the jaws 6, 7 are so arranged one to the other, that, in the shut position of the window the pin 14 rests in the real-most notch being the nearest to the pivot 8. When opening the window the pin 14 slides from one notch to a further one, thereby running through the slide-way by which the different notches are connected. In view of the fact that the width of the slide-way 18 is smaller than the diameter of the pin 14, this pin cannot move freely from one notch to another, but must open the jaws 6, 7 at every step against the action of the spring 11. If new the force, which opens the window, stops, the pin 14 must rest in the notch, reached at this moment.

The force, holding the pin in the respective notch is great enough, to avoid the window being shut suddenly or to make a free movement under the influence of a sharp wind, but, in view of the arrangement of the slide-way by having cut away the teeth between the notch, the force is not so great as to cause undue reactions on the pin. Consequently my device distinguishes effectfully from known arrangements, the jaws of which are arranged as a pair of scissors, thus causing a shearing action on the pin,

For equalizing the enlargement of the lever arm in the wider open positions of the window, it is advantageous to taper the slide-way 13 to the front end of the device, thus enlarging the clamping force at this area.

This device, described in connection with French windows, can be employed for other purposes as well, I". i. for dormer windows, hinged windows serving as wind shields at motor cars, or the like.

What I claim and desire to secure by Letters Patent of the United States is:-

1. Locking device for open windows comprising a pair of jaws hinged together and clamped one against the other by means of a spring, both said jaws being pivotally connected to the window frame, abutting parts on the front ends of the jaws for limiting their movement towards one another to form a slide way therebetween, the said slide way being of less width than the diameter of a pin secured to the window sash and projecting into the space between the jaws, said slide way being interrupted and enlarged from step to step by small notches provided in the opposi te edges of the jaws.

2. Locking device for open windows comprising a pair of jaws pivotally connected at one end by a pin, a spring surrounding said pivot pin tending to urge said jaws together, perpendicular flanges on said jaws forming a casing for said pivot pin and spring, the inner edges of the said jaws being provided with notches with partly cut-away teeth between them, thus forming a slide way tapered toward the front end of the device, and a pin mounted on the window sash and projecting into the space between the jaws, said pin posite notched portions in said inner edges of the jaws interrupting and enlarging said slide way from step to step so as to form seats for said pin, and a spring resiliently clamping said jaws against each other and cooperating with the seats in said slide way so that the jaws may be temporarily opened to allow shifting of aforesaid pin from one seat position to another in the slide way, whereupon said spring tends to close the jaws and hold said pin in the attained seat position between said jaws.

PAUL PARIS. 

